It starts as a weekend script. "I'll just write a quick Go service that receives pings and sends a Slack message."
But then you need:
- High availability (who monitors the monitor?)
- Retries for Slack API failures
- A dashboard for team members
- Historical audit logs
- Different alert channels for different teams
The Maintenance Debt
Every line of custom monitoring code is a line you have to maintain, patch, and keep online. CronRabbit's focus is 100% on heartbeat reliability, allowing your team to focus 100% on your actual product.
With a generous free tier, the ROI of "Buying" (or even using the free tier) almost always beats the internal cost of "Building."